Until 2014, the mass of a kilogram was defined as exactly equal to the mass of a special platinum-iridium cylinder kept in Sèvres, Fra

Question

Until 2014, the mass of a kilogram was defined as exactly equal to the mass of a special
platinum-iridium cylinder kept in Sèvres, France. The cylinder’s diameter and height are
both 39.2 millimeters.
What is the surface area of this cylinder?

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Ayla 3 weeks 2021-11-08T11:53:06+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-11-08T11:54:27+00:00

    Answer:

    7241.25 mm squared

    Step-by-step explanation:

    The surface area of a cylinder is denoted by: A=2\pi r^2+2\pi rh, where r is the radius and h is the height.

    Here, we know that the diameter is 39.2 mm, and since diameter is twice the radius, then r = d/2 = 39.2/2 = 19.6 mm. We also know that the height is 39.2 mm, so plug these values in:

    A=2\pi r^2+2\pi rh

    A=2\pi (19.6)^2+2\pi *19.6*39.2=7241.25 mm squared

    The answer is about 7241.25 mm squared.

    0
    2021-11-08T11:54:51+00:00

    Answer:

    surface area: 7241.25

    Step-by-step explanation:

    using this formula for surface area of cyclinder: 2πrh+2πr^2

    diameter = 2r –> 39.2 = 2r

    so r= 19.6

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